On Android, ALL CARRIERS are compatible with RoboKiller in the US and Canada. On iOS, only the carriers listed below are supported.
Currently, in the US, Verizon, AT&T, Sprint, T-Mobile, Cricket, MetroPCS, business class C-Spire are compatible with the full-featured version of RoboKiller.
In Canada, Roger, Bell Mobility, TELUS, Freedom Mobile, and MTS Communications Inc. are compatible with the full-featured version of RoboKiller.
If you are using an Android device and do not see your carrier listed above, your phone carrier may not offer a feature called "Conditional Call Forwarding". Don't worry! You will still be able to use a basic version of the RoboKiller app which does not utilize the features that depend on conditional call forwarding.